Many ex pattern flyers like an excuse to utilize a pipe.

The Evolution's alleged low power without a pipe simply typifies all gasoline/oil fueled engines when compared to glow. If you want to pay 1/10th as much for fuel with very little clean up, you should realistically not expect to receive as much power as you do from a glow fueled engine. It is that simple. Stop looking for parity in power between glow and gas/oil fueled engines. It won't ever happen, regardless of what one imagines the ad copy to say.

Ed Cregger